HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Northern Ireland

$806+ Cheap flights from Ontario (ONT) to Northern Ireland

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BFS
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Northern Ireland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Ontario to Northern Ireland

Cheapest flights from Ontario to Northern Ireland
Explore the most affordable flight options available from Ontario to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This Gotogate deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:49 pmONT - BHD
2 stops19h 16mBritish Airways
Sun 12/76:30 amBHD - ONT
2 stops19h 48mBritish Airways
Deal found 11/2$806
This FlightHub deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:47 pmONT - BHD
2 stops18h 03mBritish Airways
Mon 12/86:35 amBHD - ONT
2 stops19h 42mBritish Airways
Deal found 11/3$854
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:49 pmONT - BHD
2 stops17h 26mAmerican Airlines
Sun 12/1410:40 amBHD - ONT
2 stops21h 15mAmerican Airlines
Deal found 11/1$888
This Cheapflightsfares deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/101:26 pmONT - BHD
2 stops16h 49mBritish Airways
Mon 12/2911:30 amBHD - ONT
2 stops18h 44mBritish Airways
Deal found 11/1$2,059
This Cheapflightsfares deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/184:44 pmONT - BHD
2 stops15h 56mBritish Airways
Sat 1/311:35 amBHD - ONT
2 stops18h 39mBritish Airways
Deal found 11/2$4,951
This Cheapflightsfares deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/101:26 pmONT - BHD
2 stops16h 49mMultiple Airlines
Mon 12/2911:30 amBHD - ONT
2 stops18h 44mMultiple Airlines
Deal found 11/1$6,743

Cheap flight deals from Ontario to Northern Ireland

Keep the following information in mind while searching for Ontario to Northern Ireland flight deals. Data was last updated November 3, 2025.

Round-trip from

$806
(Gotogate)

Popular in

June

Cheapest in

October

Average price

$700
From Ontario to Northern Ireland
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 3, 2025.
Use the filters below to find and compare flights from Ontario to Northern Ireland that are best for you.

Fly from

Ontario

Fly to

Northern Ireland

Route

Depart

Return

Price

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 12/1

12:49 pm-4:05 pm

2 stops19h 16m

Belfast City

Sun 12/7

6:30 am-6:18 pm

2 stops19h 48m

$806

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 12/4

4:47 pm-6:50 pm

2 stops18h 03m

Belfast City

Mon 12/8

6:35 am-6:17 pm

2 stops19h 42m

$854

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Mon 12/1

12:49 pm-2:15 pm

2 stops17h 26m

Belfast City

Sun 12/14

10:40 am-11:55 pm

2 stops21h 15m

$888

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 4/3

5:05 pm-9:20 pm

2 stops20h 15m

Belfast City

Tue 4/7

5:25 pm-11:52 pm

2 stops38h 27m

$943

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 4/3

6:45 am-4:55 pm

2 stops26h 10m

Belfast City

Tue 4/7

5:25 pm-11:52 pm

2 stops38h 27m

$987

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Fri 4/3

5:02 pm-8:45 pm

2 stops19h 43m

Belfast City

Tue 4/7

6:35 am-11:40 pm

2 stops25h 05m

$999

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 4/29

11:01 am-3:35 pm

2 stops20h 34m

Belfast City

Sun 5/3

1:00 pm-5:46 pm

2 stops36h 46m

$1,007

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 12/10

1:26 pm-2:15 pm

2 stops16h 49m

Belfast City

Mon 12/29

11:30 am-10:14 pm

2 stops18h 44m

$2,059

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Thu 12/18

4:44 pm-4:40 pm

2 stops15h 56m

Belfast City

Sat 1/3

11:35 am-10:14 pm

2 stops18h 39m

$4,951

OntarioBelfast

ONT - BHD

ONTBHD

Ontario

Wed 12/10

1:26 pm-2:15 pm

2 stops16h 49m

Belfast City

Mon 12/29

11:30 am-10:14 pm

2 stops18h 44m

$6,743

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Best time to book a flight from Ontario to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Northern Ireland

What is the cheapest month to book a flight from Ontario to Northern Ireland?

Currently, March is the cheapest month in which you can book a flight from Ontario to Northern Ireland (average of $586). Flying from Ontario to Northern Ireland in June is currently the most expensive (average of $927). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Northern Ireland?

    For a flight from Ontario to Northern Ireland, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

  • How long is the flight from Ontario to Northern Ireland?

    For as low as $888, British Airways can have you in Northern Ireland from Ontario in 17h 26m. The distance between Ontario and Northern Ireland is about 5095 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Ontario to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Ontario to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Northern Ireland.

  • Can I find deals for business class flights from Ontario to Northern Ireland?

    Yes. Cheapflights offers flight deals from Ontario to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Northern Ireland?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Northern Ireland (average of $586). Flying from Ontario to Northern Ireland in June is currently the most expensive (average of $927). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to Gatwick flights
San Francisco to Gatwick flights
Los Angeles to London City flights
San Francisco to London City flights
Los Angeles to Stansted flights
San Diego to Heathrow flights
Ontario to Heathrow flights
San Francisco to Stansted flights
Santa Ana to Heathrow flights
Los Angeles to Luton flights
San Francisco to Luton flights
Las Vegas to Heathrow flights
San Jose to Heathrow flights
San Diego to Gatwick flights
Los Angeles to Edinburgh flights
Las Vegas to Gatwick flights
San Diego to London City flights
San Francisco to Edinburgh flights
Sacramento to Heathrow flights
Oakland to Heathrow flights
Las Vegas to London City flights
Los Angeles to Glasgow Intl flights
San Jose to Gatwick flights
Sacramento to Gatwick flights
San Diego to Stansted flights
Ontario to Gatwick flights
Los Angeles to Manchester flights
Las Vegas to Stansted flights
San Francisco to Glasgow Intl flights
Santa Ana to Glasgow Intl flights
Sacramento to London City flights
Oakland to Gatwick flights
Palm Springs to Heathrow flights
Las Vegas to Edinburgh flights
San Francisco to Southampton flights
Santa Ana to Edinburgh flights
Burbank to Heathrow flights
Ontario to Edinburgh flights
Santa Rosa to Heathrow flights
Los Angeles to Southampton flights
San Francisco to Manchester flights
Las Vegas to Luton flights
San Jose to London City flights
Fresno to Heathrow flights
Santa Ana to Manchester flights
San Diego to Edinburgh flights
San Diego to Glasgow Intl flights
San Jose to Glasgow Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.